{"product_id":"mitutoyo-378-847-g-plan-apo-20x-t3-5-objective-for-bright-field-observation-in-visible-range-with-cover-glass-compensation","title":"Mitutoyo 378-847 G Plan Apo 20X (t3.5) Objective for bright-field observation in visible range with cover glass compensation","description":"\u003cp\u003eThe G Plan Apo 20X is a precision plan apochromat objective specifically engineered for bright field inspection through 3.5 mm thick cover glass. Designed for applications where observation must be carried out through protective or structural glass, it ensures accurate, high-contrast imaging without optical distortion.\u003c\/p\u003e\n\u003cp\u003eFeaturing an infinity-corrected optical system and high-quality plan apochromat design, the G Plan Apo 20X delivers flat-field performance and excellent chromatic correction across the visible wavelength range (436–656 nm).\u003c\/p\u003e\n\u003cp\u003eWith an extended working distance of 30.6 mm through 3.5 mm glass, this objective provides exceptional clearance while maintaining strong optical performance. Dedicated glass thickness correction ensures optimal image quality when observing through thick substrates.\u003c\/p\u003e\n\u003cp\u003eCompatible with VMU \/ FS-70 \/ MF-U \/ Hyper MF-U microscope systems, the G Plan Apo series is ideal for industrial inspection environments where reliable observation through thick glass is required.\u003c\/p\u003e\n\u003cp\u003eCustomisation Available: Mitutoyo can provide custom cover glass correction to suit specific applications. Thickness, material, and refractive index can be specified within standard limits.\u003c\/p\u003e\n\u003cp\u003eKey Features\u003c\/p\u003e\n\u003cp\u003eDesigned for observation through 3.5 mm thick cover glass\u003c\/p\u003e\n\u003cp\u003eHigh-quality Plan Apochromat optical design\u003c\/p\u003e\n\u003cp\u003eInfinity corrected\u003c\/p\u003e\n\u003cp\u003eDedicated glass thickness compensation\u003c\/p\u003e\n\u003cp\u003eOptimised for visible wavelength range (436–656 nm)\u003c\/p\u003e\n\u003cp\u003eCustom cover glass correction available on request\u003c\/p\u003e\n\u003cp\u003eSpecifications\u003c\/p\u003e\n\u003cp\u003eModel: G Plan Apo 20X\u003c\/p\u003e\n\u003cp\u003eMagnification: 20x\u003c\/p\u003e\n\u003cp\u003eGlass thickness correction: t3.5 mm\u003c\/p\u003e\n\u003cp\u003eWorking distance (through glass): 30.6 mm\u003c\/p\u003e\n\u003cp\u003eWorking distance (in air): 29.42 mm\u003c\/p\u003e\n\u003cp\u003eNumerical Aperture (N.A.): 0.28\u003c\/p\u003e\n\u003cp\u003eCorrected wavelength range: 436–656 nm\u003c\/p\u003e\n\u003cp\u003eResolving power: 1 µm\u003c\/p\u003e\n\u003cp\u003eDepth of field: 3.5 µm\u003c\/p\u003e\n\u003cp\u003eField of view (ø24 mm eyepiece): ø1.2 mm\u003c\/p\u003e\n\u003cp\u003eField of view (1\/2” camera chip): 0.24 × 0.32 mm\u003c\/p\u003e\n\u003cp\u003eParfocal distance (P.D.): 96.19 mm\u003c\/p\u003e\n\u003cp\u003eSpectral range: VIS\u003c\/p\u003e\n\u003cp\u003eObservation mode: Brightfield\u003c\/p\u003e\n\u003cp\u003eGlass compensation: Yes\u003c\/p\u003e\n\u003cp\u003eLaser applications: No\u003c\/p\u003e\n\u003cp\u003eMass: 270 g\u003c\/p\u003e","brand":"Mitutoyo","offers":[{"title":"Default Title","offer_id":56428524011900,"sku":"378-847","price":2925.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/9428\/5114\/files\/Mitutoyo378-847GPlanApo20X_t3.5_Objectiveforbright-fieldobservationinvisiblerangewithcoverglasscompensation.jpg?v=1772480811","url":"https:\/\/www.hroberts-di.com\/products\/mitutoyo-378-847-g-plan-apo-20x-t3-5-objective-for-bright-field-observation-in-visible-range-with-cover-glass-compensation","provider":"H Roberts \u0026 Sons","version":"1.0","type":"link"}